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One picture of the Periodic table of elements.



Second Periodic table of elements

One video:
http://www.youtube.com/watch?v=z1hzatoE1tg
Two video:
http://www.youtube.com/watch?v=IIEFDo0fAfo
Three video:
http://www.youtube.com/watch?v=UclxSfPoapc

Wis link:
https://www.winchendon.org/podium/default.aspx?t=226
Chemistry times:
http://www.chemistrytimes.com/